We divided form by 3 and to each part we added wheel picker. The problem is touch of the pickers is moved so we can't easly change values. Form is in side bar.

Below three pickers in form.

Form {
                    
                    Section {
                        TextField("\(nodes.n_array[id].text)", text: $nodes.n_array[id].text)
                        } header: { Text("Tekst") }
                    
                    Section {
                        HStack(spacing: 0) {
                                
                                Picker("Red", selection: $nodes.n_array[id].red) {
                                    
                                    ForEach(0...255, id: \.self) { red in
                                        Text("\(red)")
                                    }
                                    
                                }
                                .pickerStyle(.wheel)
                                .frame(minWidth: 0)
                                .clipped()
                                
                                
                                Picker("Green", selection: $nodes.n_array[id].green) {
                                    
                                    ForEach(0...255, id: \.self) { green in
                                        Text("\(green)")
                                    }
                                    
                                }
                                .pickerStyle(.wheel)
                                .frame(minWidth: 0)
                                .clipped()
                                
                                Picker("Blue", selection: $nodes.n_array[id].blue) {
                                    
                                    ForEach(0...255, id: \.self) { blue in
                                        Text("\(blue)")
                                    }
                                    
                                }
                                .pickerStyle(.wheel)
                                .frame(minWidth: 0)
                                .clipped()
                                
                                
                            }
                    } header: { Text("Kolor") }
                            
                }
            
                }

Working application